[PULL 24/63] tests: test-smp-parse: Add the test for cores/threads per socket helpers

[Michael S. Tsirkin]

From: Zhao Liu <zhao1.liu@intel.com>

Use the different ways to calculate cores/threads per socket, so that
the new CPU topology levels won't be missed in these 2 helpes:

* machine_topo_get_cores_per_socket()
* machine_topo_get_threads_per_socket()

Test the commit a1d027be95bc3 ("machine: Add helpers to get cores/
threads per socket").

Suggested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20231023094635.1588282-2-zhao1.liu@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 tests/unit/test-smp-parse.c | 67 ++++++++++++++++++++++++++++++-------
 1 file changed, 54 insertions(+), 13 deletions(-)

diff --git a/tests/unit/test-smp-parse.c b/tests/unit/test-smp-parse.c
index fdc39a846c..24972666a7 100644
--- a/tests/unit/test-smp-parse.c
+++ b/tests/unit/test-smp-parse.c
@@ -394,20 +394,47 @@ static char *smp_config_to_string(const SMPConfiguration 
*config)
         config->has_maxcpus ? "true" : "false", config->maxcpus);
 }
 
-static char *cpu_topology_to_string(const CpuTopology *topo)
+/* Use the different calculation than machine_topo_get_threads_per_socket(). */
+static unsigned int cpu_topology_get_threads_per_socket(const CpuTopology 
*topo)
+{
+    /* Check the divisor to avoid invalid topology examples causing SIGFPE. */
+    if (!topo->sockets) {
+        return 0;
+    } else {
+        return topo->max_cpus / topo->sockets;
+    }
+}
+
+/* Use the different calculation than machine_topo_get_cores_per_socket(). */
+static unsigned int cpu_topology_get_cores_per_socket(const CpuTopology *topo)
+{
+    /* Check the divisor to avoid invalid topology examples causing SIGFPE. */
+    if (!topo->threads) {
+        return 0;
+    } else {
+        return cpu_topology_get_threads_per_socket(topo) / topo->threads;
+    }
+}
+
+static char *cpu_topology_to_string(const CpuTopology *topo,
+                                    unsigned int threads_per_socket,
+                                    unsigned int cores_per_socket)
 {
     return g_strdup_printf(
         "(CpuTopology) {\n"
-        "    .cpus     = %u,\n"
-        "    .sockets  = %u,\n"
-        "    .dies     = %u,\n"
-        "    .clusters = %u,\n"
-        "    .cores    = %u,\n"
-        "    .threads  = %u,\n"
-        "    .max_cpus = %u,\n"
+        "    .cpus               = %u,\n"
+        "    .sockets            = %u,\n"
+        "    .dies               = %u,\n"
+        "    .clusters           = %u,\n"
+        "    .cores              = %u,\n"
+        "    .threads            = %u,\n"
+        "    .max_cpus           = %u,\n"
+        "    .threads_per_socket = %u,\n"
+        "    .cores_per_socket   = %u,\n"
         "}",
         topo->cpus, topo->sockets, topo->dies, topo->clusters,
-        topo->cores, topo->threads, topo->max_cpus);
+        topo->cores, topo->threads, topo->max_cpus,
+        threads_per_socket, cores_per_socket);
 }
 
 static void check_parse(MachineState *ms, const SMPConfiguration *config,
@@ -415,14 +442,26 @@ static void check_parse(MachineState *ms, const 
SMPConfiguration *config,
                         bool is_valid)
 {
     g_autofree char *config_str = smp_config_to_string(config);
-    g_autofree char *expect_topo_str = cpu_topology_to_string(expect_topo);
-    g_autofree char *output_topo_str = NULL;
+    g_autofree char *expect_topo_str = NULL, *output_topo_str = NULL;
+    unsigned int expect_threads_per_socket, expect_cores_per_socket;
+    unsigned int ms_threads_per_socket, ms_cores_per_socket;
     Error *err = NULL;
 
+    expect_threads_per_socket =
+                        cpu_topology_get_threads_per_socket(expect_topo);
+    expect_cores_per_socket =
+                        cpu_topology_get_cores_per_socket(expect_topo);
+    expect_topo_str = cpu_topology_to_string(expect_topo,
+                                             expect_threads_per_socket,
+                                             expect_cores_per_socket);
+
     /* call the generic parser */
     machine_parse_smp_config(ms, config, &err);
 
-    output_topo_str = cpu_topology_to_string(&ms->smp);
+    ms_threads_per_socket = machine_topo_get_threads_per_socket(ms);
+    ms_cores_per_socket = machine_topo_get_cores_per_socket(ms);
+    output_topo_str = cpu_topology_to_string(&ms->smp, ms_threads_per_socket,
+                                             ms_cores_per_socket);
 
     /* when the configuration is supposed to be valid */
     if (is_valid) {
@@ -433,7 +472,9 @@ static void check_parse(MachineState *ms, const 
SMPConfiguration *config,
             (ms->smp.clusters == expect_topo->clusters) &&
             (ms->smp.cores == expect_topo->cores) &&
             (ms->smp.threads == expect_topo->threads) &&
-            (ms->smp.max_cpus == expect_topo->max_cpus)) {
+            (ms->smp.max_cpus == expect_topo->max_cpus) &&
+            (ms_threads_per_socket == expect_threads_per_socket) &&
+            (ms_cores_per_socket == expect_cores_per_socket)) {
             return;
         }
 
-- 
MST